Install Windows Server 2012 with GPT

There are three 4TB disks built with RAID5, install Windows Server 2012 R2

We have ~7.2TB free space to use, during installation, we need convert disk to GPT instead of MBR, if using MBR, one partition size could not be larger than 2Tib, so I have to convert to GPT mode.

Use UEFI boot mode, I tried legacy mode with install windows server 2008r2, I can't convert disk to GPT mode, and can't install windows 2008 r2 with UEFI, so I use windows server 2012r2 with UEFI.

Shift+F10 will activate a command line prompt

  • diskpart
  • list disk
  • select disk X ( X is one of 0, 1, etc)
  • clean
  • convert gpt
  • exit

Then install as normal.